Pillow for separating knees



FIG. 1 is a top perspective view of a pillow for separating knees showing my new design;

FIG. 2 is a right side elevational view thereof, the side opposite being a mirror of that shown;

FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror of that shown;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a top plan view thereof. 

The ornamental design for a pillow for separating knees, as shown and described. 